Talk:Hydro-erosive grinding

Extrusion honing

What's the difference between this, and the rather better known term of extrusion honing? Even abrasive flow machining (as a term) would seem to have more currency than this. Andy Dingley (talk) 00:03, 6 August 2009 (UTC)

To be honest I know nothing about this process, however I did find it in a google book search, so I know that it is a legit process. Perhaps it is the same thing as AFM or extrusion honing, but I wouldn't know. If it is, then feel free to merge/move it. Wizard191 (talk) 02:29, 6 August 2009 (UTC)

"Extrusion honing" has been around for 40-50 years or so. It's a fettling/denibbing process for internal passageways, particularly with hydraulic and fuel handling pumps / valves in aerospace. AIUI, it developed to meet the needs of increasingly complicated engine controls as jet engines developed. I've also seen it used more recently in car engine manufacture for smoothing valve ports (as used to be done manually with a flex-shaft and stone, when tuning engines).

AIUI, "Extrusion honing" was invented as a descriptive name, then "Extrude Hone Co." were founded to develop it futher. As "extrusion honing" was already a term in circulation, they took to re-naming it abrasive flow machining to brand it as their own product, even though the other term was older, in use and had even given rise to their own company's name!

It looks as if the previously-referenced German company might have done something similar, but we've expunged so much of their wp history as "advertising" that it's hard to track back. Is "grinding" conflated with "honing" because it's just lax word re-use and translation issues (honing isn't quite the same thing as grinding), or is this some beefier version of the process that can remove sifgnificantly more metal? Why is it "hydro-erosive" all of a sudden? Are we looking at greater flows, greater cut rates or nozzle influences as well? Has this process moved beyond honing into something towards waterjet cutting?

There's no rush here, we need to do some research first. Also I don't mind articles that are "OMG BLATANT ADVERTIZINGS!!!" when what they really are is a legit encyclopedic description of a proprietary process, but I do wish people would write their ad copy so that it has more useful content in it. I don't much care who writes the content, so long as we end up with good encyclopedic description of something appropriate.

If (as seems likely though) it's all the same old, same old, then I'd suggest merging the lot into Extrusion honing, with redirs, and appropriate wl. to a business-based article on Extrude Hone Corporation. Andy Dingley (talk) 10:03, 6 August 2009 (UTC)